US3190249A - Tensioning device for the upper thread in a sewing machine - Google Patents

Tensioning device for the upper thread in a sewing machine Download PDF

Info

Publication number
US3190249A
US3190249A US246205A US24620562A US3190249A US 3190249 A US3190249 A US 3190249A US 246205 A US246205 A US 246205A US 24620562 A US24620562 A US 24620562A US 3190249 A US3190249 A US 3190249A
Authority
US
United States
Prior art keywords
thread
arm
tension
sewing machine
tensioning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US246205A
Other languages
English (en)
Inventor
Jr Fritz Gegauf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fritz Gegauf AG
Original Assignee
Fritz Gegauf AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fritz Gegauf AG filed Critical Fritz Gegauf AG
Application granted granted Critical
Publication of US3190249A publication Critical patent/US3190249A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B47/00—Needle-thread tensioning devices; Applications of tensometers

Definitions

  • the object of the present invention is to realize a tensioning device for the upper thread in a sewing machine, which device simplifies the threadingof the upper thread, technically improves the sewing and further improves the appearance of the sewing machinerby not being placed in the angle of View to the needle.
  • the tensioning devices for the upper thread known heretofore generally comprise a pair of tension disks placed outside of the sewing machine, a tensioning spring and an adjusting nut. In most of the cases thesetensioning devices are Vassembled as a unit together withthe Ithread control spring. placed below the lowermost position of the take-up lever, generally on the front side of the machine. Por the threading operation the upper thread must be threaded from the ⁇ bobbin, sitting on a support, through one or several open or closed thread eyes. Hereaiter the thread has to be guided between the tension disks and simultaneously suspended in the control spring; ThenV the thread is guided to theboring in the take-up lever over the rigid dehecting bolt or control stirrup controlled by the cloth bar.
  • FIGURE l is a front-view of a sewing machine
  • FIGURE 4 is a partial longitudinal sectional view of the upper part of the upper arm Vof the sewing machine with a double thread tensioning device
  • FIGURE 5 is a top view of the double threadtensioning device with a releasing lever and an indicating device, the upper wall of the arm being removed.
  • reference numeral 1 designates the base plate of the sewing machine onto which is mounted theupper arm 2.
  • the Vhorizontal part ofthe arm-2 is closed by a cover 3 and the front side of the arm head is closed by a cover d from which projects a switch button S for the mounted light.
  • the machine is driven in a known way by the belt of a handwheel 6.
  • a bobbin holderV l2 with two pins 173 and l. .adapted to receive bobbins.
  • Reference numeral 15 designates a bobbin from which is withdrawn the sewing thread 16.
  • Reference numeral 17 designa-tes the bolt of a pre-tensioning With the present invention for the first time a thread ,tensioning means hasV been developed, the tension disks device against which is pressed a tension disk 18 loaded by af spring 19. ⁇ Al transverse slot 20 in the cover 3 has ,on both sides thread guides y2l and 22.
  • This plate carries a slotted thread tensioning bolt 26 held in position by a nut 27 andra resilient washer 28.
  • a doublethread tensioning device comprising tension disks 29, 26, 31 in such manner'that the tension surfaces ofthe disks extend in parallel to the transverse slot Ztl.
  • further washers 32 and 33 On both sides fof the tension disks there are arranged further washers 32 and 33. As well as the tension disks as also the washers 32 and 33 are maintained in positionby a pin 34 secured in the supporting plate 23.
  • TheV tensioning pressure is transmitted by a pressure disk 35 engaging with its web 36 and slotted threadV tensioning bolt 26.
  • a spring 37 bears against a flange 38 of an adjusting nut 39.
  • The, latter comprises a coupling slot 40 engaged by drivers 4l and 42 of an Vof the thread tensioning Y tension release bolt 53 is housed in the hollow kthread* tension bolt 26V and presses against the web 36 of theV pressure disk 35- ActuationV of the pressure member 51Y FIGURE 4 is eiected by the in direction of Vthe arrow in pressure foot mechanism (not shown).
  • Thepressure member 51 is maintained in position laterallybyl a lockV washer 54.
  • YTo the supporting plate 23 there is pivotally Y mounted a double lever 55, 56.
  • the pivoting axle for this double lever 55, 56 is formed by a shoulder. screw 57,.
  • a scale is adjustably arranged; This scale is designated by YSti Vand carries a marking 59. -Itfis secured by a screw 60 and is adapted tol be tilted and disp-lacedV about a bolt 61.
  • the leg 55 of the double lever 55, 56 bears Yagainst the flange 38 of the adjusting nut 39, The constant contact is ascertained by a torsion spring 62 wound about the bolt 57.
  • One leg of spring 62 is connected withthe'leg 55 ofthe lever 55,
  • a sewing machine including a vertical standard supporting a substantially horizontal upper arm ⁇ having vupper surface andV betweensaid side surfaces, and havingV spring biased thread tensioning disks, the thread engaging i means operatively* associated with said disk, and ina marking 64 by means of which the thread tension may f be read.
  • van V'upper thread tensioning device as claimedin claim 1, including a tension release device operatively associated with said disks; rand a supf ⁇ i port plate mounting vsaid thread tensioning device and ⁇ said tension release device, andremovably secured within said upper arm.
  • an upper thread tensioning device as claimed in claim-2,l said upper arnrincludingxa cover extending longitudinally thereof and-forming :its upper surface; said slot being formed in said cover; said tensionrelease device being positioned on the inner ⁇ side Y -1 .gaged with Vsaid, bolt; saidmanual adjuster including a rectly at the adjusting disk in connectioniwith a rigid marking.
  • said indication'then is not, as in the ⁇ described embodiment, in Vthe field of view of the operator.
  • rotatable knob having a disk'head and coupledtosaid'- nut to rotate said nut while providing for axial displacement of said nut relative to said vknob; ⁇ the disk head ofy saidV knob extending through a 'second upwardly opening slot extending transverselyofthe' ⁇ upper surface ofgsaid arm between said side surfaces,and spaced longitudinally trom said iirst slot; the width of said second kslot being of the order o f a thicknessof said disk headof said knob.
  • an upper thread tensioning device as claimed'in claim'l including an indicating device i mounted on said supporting plate Vand having an innerY end coupled with saidtension adjustingl means for movementwithV the latter; said indicating device having an outer end carrying tension indicia; .the upper surfaces of said ⁇ arm beingA formed with a window therethrough, and. lanA Outer end of said indicating device being visible through said window.V

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US246205A 1962-01-10 1962-12-20 Tensioning device for the upper thread in a sewing machine Expired - Lifetime US3190249A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH25062A CH400738A (de) 1962-01-10 1962-01-10 Nähmaschine

Publications (1)

Publication Number Publication Date
US3190249A true US3190249A (en) 1965-06-22

Family

ID=4182715

Family Applications (1)

Application Number Title Priority Date Filing Date
US246205A Expired - Lifetime US3190249A (en) 1962-01-10 1962-12-20 Tensioning device for the upper thread in a sewing machine

Country Status (4)

Country Link
US (1) US3190249A (de)
AT (1) AT241252B (de)
CH (1) CH400738A (de)
GB (1) GB960337A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347195A (en) * 1963-12-20 1967-10-17 Gegauf Fritz Ag Tensioning device for a sewing machine
US3667414A (en) * 1970-09-25 1972-06-06 Singer Co Thread tensioning device for sewing machines
US3721205A (en) * 1970-02-09 1973-03-20 Aisin Seiki Tension device for a sewing machine
US3841248A (en) * 1973-07-23 1974-10-15 Singer Co Needle thread tensioning module for lock stitch sewing machines
US3863581A (en) * 1972-09-13 1975-02-04 Maruzen Sewing Machine Thread tensioning device for sewing machines
US3978802A (en) * 1974-11-08 1976-09-07 White Sewing Machine Company Sewing machine thread tensioner
US4221180A (en) * 1977-09-21 1980-09-09 The Singer Company Compact upper thread tension device
US4301757A (en) * 1978-06-13 1981-11-24 Janome Sewing Machine Co. Ltd. Automatic thread tension control device of sewing machine
US6050205A (en) * 1998-03-31 2000-04-18 Brother Kogyo Kabushiki Kaisha Sewing machine with thread tension releasing mechanism
EP2489771A1 (de) * 2011-02-21 2012-08-22 Aisin Seiki Kabushiki Kaisha Nähmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH184853A (de) * 1934-11-12 1936-06-30 Wilhelm Dr Schweiger Curt Verfahren und Vorrichtung zur Anpassung der Oberfadenspannung an die Unterfadenspannung bei Nähmaschinen.
US2166770A (en) * 1937-07-02 1939-07-18 Robert Ramon Casas Tension device for sewing machines
US2294074A (en) * 1939-11-30 1942-08-25 Union Special Machine Co Sewing machine
US2297061A (en) * 1939-07-15 1942-09-29 Singer Mfg Co Thread-controlling mechanism for overedge sewing machines
US2298767A (en) * 1940-06-03 1942-10-13 Union Special Machine Co Closure hinge means
US2609772A (en) * 1948-12-20 1952-09-09 Mefina Sa Sewing machine
US3035534A (en) * 1960-06-14 1962-05-22 White Sewing Machine Corp Sewing machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH184853A (de) * 1934-11-12 1936-06-30 Wilhelm Dr Schweiger Curt Verfahren und Vorrichtung zur Anpassung der Oberfadenspannung an die Unterfadenspannung bei Nähmaschinen.
US2166770A (en) * 1937-07-02 1939-07-18 Robert Ramon Casas Tension device for sewing machines
US2297061A (en) * 1939-07-15 1942-09-29 Singer Mfg Co Thread-controlling mechanism for overedge sewing machines
US2294074A (en) * 1939-11-30 1942-08-25 Union Special Machine Co Sewing machine
US2298767A (en) * 1940-06-03 1942-10-13 Union Special Machine Co Closure hinge means
US2609772A (en) * 1948-12-20 1952-09-09 Mefina Sa Sewing machine
US3035534A (en) * 1960-06-14 1962-05-22 White Sewing Machine Corp Sewing machine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347195A (en) * 1963-12-20 1967-10-17 Gegauf Fritz Ag Tensioning device for a sewing machine
US3721205A (en) * 1970-02-09 1973-03-20 Aisin Seiki Tension device for a sewing machine
US3667414A (en) * 1970-09-25 1972-06-06 Singer Co Thread tensioning device for sewing machines
US3863581A (en) * 1972-09-13 1975-02-04 Maruzen Sewing Machine Thread tensioning device for sewing machines
US3841248A (en) * 1973-07-23 1974-10-15 Singer Co Needle thread tensioning module for lock stitch sewing machines
US3978802A (en) * 1974-11-08 1976-09-07 White Sewing Machine Company Sewing machine thread tensioner
US4221180A (en) * 1977-09-21 1980-09-09 The Singer Company Compact upper thread tension device
US4301757A (en) * 1978-06-13 1981-11-24 Janome Sewing Machine Co. Ltd. Automatic thread tension control device of sewing machine
US6050205A (en) * 1998-03-31 2000-04-18 Brother Kogyo Kabushiki Kaisha Sewing machine with thread tension releasing mechanism
EP2489771A1 (de) * 2011-02-21 2012-08-22 Aisin Seiki Kabushiki Kaisha Nähmaschine
US8479672B2 (en) 2011-02-21 2013-07-09 Aisin Seiki Kabushiki Kaisha Sewing machine

Also Published As

Publication number Publication date
GB960337A (en) 1964-06-10
CH400738A (de) 1965-10-15
AT241252B (de) 1965-07-12

Similar Documents

Publication Publication Date Title
US3190249A (en) Tensioning device for the upper thread in a sewing machine
GB683348A (en) Improvements in or relating to sewing machines
US4111140A (en) Thread tensioning device for a sewing machine
US2401216A (en) Presser-foot lifting mechanism for sewing machines
US3721205A (en) Tension device for a sewing machine
GB839233A (en) Thread tension mechanism for sewing machines
JPH0210058B2 (de)
US1312799A (en) moffatt and r
GB1099587A (en) Presser mechanisms for sewing machines
US2946301A (en) Looper throw out for sewing machines
US2730979A (en) Sewing machine
US2895442A (en) Work table height adjusting mechanism for blindstitch sewing machines
US2988029A (en) Bobbin winder for sewing machines
US981521A (en) Thread lock and take-up for sewing-machines.
US2335838A (en) Strip-tensioning device for sewing machines
US920141A (en) Sewing-machine.
US2491622A (en) Sewing-machine mechanism for performing darning operations
US2189732A (en) Thread tensioning attachment for sewing machines
US434037A (en) N wheeler
US3863581A (en) Thread tensioning device for sewing machines
US3295484A (en) Sewing machine triple feeder attachment for stitching elastic to cloth pieces
US1110024A (en) Sewing-machine for boots and shoes.
DE910246C (de) Schuhmacher-Reparatur-Naehmaschine
US255581A (en) And chaeles h
US277281A (en) Tension device for sewing-machines